The Trump administration delivered a new stark warning about the use of chemical weapons to the Syrian government of President Bashar al-Assad, saying the U.S. had detected "potential preparations” to use the banned weapons again; an April chemical attack that…

President Trump's mantra "America First" was a signal that he planned to focus on improving prospects at home. But in his first 100 days, global crises have challenged him with frequent and treacherous tests. Chief foreign affairs correspondent Margaret Warner…

A searing new documentary on the Syrian civil war and the rise of the Islamic State group called "Hell on Earth” debuts at the Tribeca Film Festival this week. Hari Sreenivasan talks to journalist and the film’s co-director Sebastian Junger…

Discord was on display at Secretary of State Rex Tillerson's Moscow meetings with Russian Foreign Minister Sergey Lavrov. The most immediate trigger for tensions was a deadly sarin gas attack in Syria, and the U.S. attack on a Syrian air…

Secretary of State Rex Tillerson arrived in Moscow amid tensions over a deadly chemical attack in Syria. Tillerson faulted Russia for failing to enforce a deal it helped negotiate to rid Syria of chemical weapons. Russian President Vladimir Putin likened…

President Trump ordered a U.S. military strike Thursday night in Syria. The target: the Assad military’s Sharyat air base, which U.S. officials say acted as a launch pad for a chemical attack that killed more than 80 people. The attack…